Add time:08/02/2019         Source:sciencedirect.com

A hybrid counter electrode (CE) of vanadium sulfide decorated with carbon nanotubes (CNTs/VS2) for efficient dye-sensitized solar cells (DSSCs) was prepared by using an in situ hydrothermal route, and the DSSC based on the CNTs/VS2 CE prepared at 180 °C and contained 0.05 g CNTs exhibits a power conversion efficiency of 7.72% under illumination of 100 mW cm−2. The surface morphology of the VS2 and CNTs/VS2 changed from nanoparticles to one-dimensional (1D) structure was significantly affected by temperature. The electrochemical performance analyses including cyclic voltammetry, electrochemical impedance and Tafel curves for the CNTs/VS2 CEs with different temperatures and CNT contents reveal that the CNTs/VS2 CE possesses the better electrocatalytic activity and lower charge transfer resistance at the electrolyte|CE interface for I−/I3− liquid electrolyte at 180 °C and 0.05 g CNTs.

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